Sorry Ninja but you're not allowed to have a hetero-day, as that would be seen as offensive to the LGBTQ(feel free to add more letters, I forget the rest of them) community, and you would be branded some sort of bigot or something. These days, if you're not what genetics would consider the 'norm' - i.e. a man or woman, content with your own gender / organs and attracted to the opposite sex - then you apparently have to have parades and legislation and all sorts of other special things to show that you're just the same as everyone else...even though you're blatantly not because you have to have parades etc to highlight the fact....
If there were true equality and diversity, there'd be no parades or 'days' for anyone - LGBT, women, people of different skin colours, religions, nothing. But there isn't. Now we've gone the other way round.